Home / 2,921.58-4,381.20-1,381.50

Finding the Fourth Proportional to 2,921.58, 4,381.20 and 1,381.50

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Solution

The fourth proportional to 2,921.58, 4,381.20 and 1,381.50 is: 2,071.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,921.58 : 4,381.20 = 1,381.50 : x
  2. Step 2: Convert to fraction form
    2,921.58/4,381.20 = 1,381.50/x
  3. Step 3: Cross multiply
    2,921.58x = 4,381.20 × 1,381.50
  4. Step 4: Simplify right side
    2,921.58x = 6,052,627.80
  5. Step 5: Solve for x
    x = 6,052,627.80/2,921.58
  6. Step 6: Final answer
    x = 2,071.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.